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Travel Trailer

Gulf Stream Trailmaster 321tbs

Gulf Stream Trailmaster 321tbs

Compare specs across all model years (2012–2022)

11
Model Years
9
Sleeps
36' 7"
Length
Our Recommendation
Which Year Should You Buy?
2022 Trailmaster 321tbs Best Choice

Highest Mint Score (27.4). Most recent model year with latest updates.

View 2022 Full Specs & Tow Guide →

What Changed Year-Over-Year

2021 2022

Larger Fresh Tank

Fresh water capacity changed from 42 to 51 gallons.

2019 2020

Tank Capacity Change

Fresh water capacity changed from 51 to 42 gallons.

2018 2019

Length Increased

Length changed from 35' 8" to 36' 7".

All Model Years

Can Your Vehicle Tow the Trailmaster 321tbs?

Enter your truck specs to see if any of these model years fit your towing capacity—and which year gives you the most safety margin.

View Towing Calculator
Tip: Click a year to see the full specs, tow guidance, and recommended gear for that model year.

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Our mission is to help people make well-informed RV buying decisions, so they can leave the noise and screens behind, reconnect with family, and create unforgettable memories in the great outdoors.

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